CN216599410U - Power supply module with input voltage malfunction identification capability - Google Patents
Power supply module with input voltage malfunction identification capability Download PDFInfo
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- CN216599410U CN216599410U CN202122662523.0U CN202122662523U CN216599410U CN 216599410 U CN216599410 U CN 216599410U CN 202122662523 U CN202122662523 U CN 202122662523U CN 216599410 U CN216599410 U CN 216599410U
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Abstract
The utility model discloses a power supply module with the capability of identifying misoperation of input voltage. The power supply module comprises a control protection circuit A, a control protection circuit B, a power supply conversion circuit and a filter circuit; the power supply conversion circuit adopts an LM22672-ADJ chip; the control protection circuit A adopts a MAX9021AUK-T chip, and the control protection circuit B adopts a MAX16053 chip. The power supply module adopts an integrated design, the circuit is simple, the number of peripheral devices is small, and the research and development and production cost is reduced. The power supply module has the capacity of resisting undervoltage surge, has the capacity of identifying input voltage misoperation, can better protect the powered device and prevent the later-stage circuit misoperation. The special functions of the integrated chips MAX16053 and MAX9021AUK-T and the peripheral circuit are realized, and the problem of false operation of the existing power supply system caused by instability of input power supply voltage is solved.
Description
Technical Field
The utility model relates to a special power supply, in particular to a power supply module with the capability of identifying input voltage misoperation. The power supply module can supply power for some power receiving equipment sensitive to input voltage, can better protect the power receiving equipment and prevent misoperation of the power receiving equipment.
Background
The current power supply system can cause misoperation of the power receiving equipment due to instability of input power supply voltage. The special power supply has the characteristics of low working voltage, small working current, small volume and size, perfect protection measures and the like. Generally applied to occasions with special requirements on power supply. Different from the index requirements of common power supply modules, the design requirements of special power supplies are more strict, and the content of the index requirements is different.
Disclosure of Invention
In view of the problems in the prior art, the utility model provides a power supply module with the capability of identifying the misoperation of an input voltage.
The technical scheme adopted by the utility model is as follows: a power supply module with input voltage malfunction identification capability is characterized in that: the power supply module comprises a control protection circuit A, a control protection circuit B, a power supply conversion circuit and a filter circuit consisting of input and output filters; the power supply conversion circuit adopts an LM22672-ADJ chip U3 and a peripheral circuit; the control protection circuit A adopts a chip U2 with the model of MAX9021AUK-T and a peripheral circuit thereof, and the control protection circuit B adopts a chip U1 with the model of MAX16053 and a peripheral circuit thereof; the control protection circuit A and the control protection circuit B are respectively connected with the power conversion circuit, and the input and output filter circuits are respectively connected with the power conversion circuit.
The connection relationship among the chip U3, the peripheral circuit and the filter circuit is as follows: the + Vin input end is connected to the 7 pins of the chip U3 through one ends of a connecting resistor R7, a capacitor C4 and a capacitor C3, and the 3 pins and the 2 pins of the chip U3 are connected with the common ground through a resistor R14 and a capacitor C10 respectively; a pin 5 of the chip U3 is connected with the other end of the resistor R7, the cathode of the Zener diode D2 and one end of the capacitor C9, and is also connected with the drain of the field effect transistor Q1, and the grid of the field effect transistor Q1 is connected to a pin 4 of the chip U1 in the control protection circuit B through the resistor R13; the source electrode of the field effect transistor Q1, the other end of the capacitor C9 and the anode of the Zener diode D2 are connected with the common ground; a pin 4 of the chip U3 is connected with one end of a resistor R17, a resistor R9 and one end of a resistor R10, a pin 1 of the chip U3 is connected with one end of an energy storage inductor L1 and a cathode of a Schottky diode D3 through a capacitor C6, and is simultaneously connected to a pin 8 of the chip U3; the other end of the energy storage inductor L1 is connected with the other ends of the resistor R17 and the resistor R9 and one ends of the capacitor C11 and the resistor R15 and then connected with the + Vout output end, and the other end of the resistor R10 is connected with the common ground; the anode of the schottky diode D3 is connected to the other end of the capacitor C11 and the resistor R15 and then to the common ground.
The connection relationship between the chip U2 and its peripheral circuit is: the + Vin input end is connected with one end of a capacitor C7, a resistor R8 and a resistor R16 through a connecting resistor R4 and then connected to a pin 2 of the chip U2, and the other ends of the capacitor C7, the resistor R8 and the resistor R16 are connected and then connected with the common ground; pin 1 of the chip U2 is connected to pin 3 of the chip U1 in the control protection circuit B; the resistor R5 is connected with one end of a resistor R11, one end of a capacitor C8 and one end of a resistor R12, the resistor R11 and the other end of the capacitor C8 are connected with the 3 pins of the chip U2, and then the other ends of the resistor R11 and the capacitor C8 are connected with the common ground; a pin 5 of the chip U2 is connected with a capacitor C2, one end of a resistor R6, a cathode of a Zener diode D1 and the other end of a resistor R12, and the other end of the capacitor C2 is connected with a pin 4 of the chip U2 and then connected with the common ground; the other end of the resistor R6 is connected with the + Vin input end; the anode of the zener diode D1 is connected to common ground.
The connection relationship between the chip U1 and its peripheral circuit is: a pin 1 of the chip U1 is connected with one ends of the resistor R2 and the resistor R1, and the other end of the resistor R1 is connected with the common ground; pin 2 of chip U1 is connected to common ground; a pin 3 of the chip U1 is connected to a pin 1 of a chip U2 in the control protection circuit A, the other end of the resistor R2 and a pin 5 of the chip U1 are connected, and a pin 4 of the chip U1 is connected with the grid electrode of the field effect transistor Q1 through a resistor R13 in the power conversion circuit; the pin 6 of the chip U1 is connected with one end of a resistor R3, a capacitor C5 and a capacitor C1, and the other ends of the resistor R3, the capacitor C5 and the capacitor C1 are connected and then connected with the common ground.
Compared with the prior art, the utility model has the following beneficial effects: the power supply module has the capacity of resisting undervoltage surge, has the capacity of identifying input voltage misoperation, can supply power for some powered equipment sensitive to input voltage, can better protect the powered equipment, prevents the misoperation of a rear-stage circuit, adopts integrated chips MAX16053, MAX9021AUK-T and a peripheral circuit to realize special functions, and solves the misoperation problem caused by the instability of the input power supply voltage of the existing power supply system.
The power supply module adopts an integrated design, has a simple circuit and few peripheral devices, reduces the research and development and production cost, and has the characteristics of high reliability, low cost and the like. The module has small packaging size and wide power supply range, can adapt to various power supply conditions, and is better embedded into various system devices. Based on the characteristics of simple circuit, small size and the like, the power supply can be flexibly applied to various devices.
Drawings
FIG. 1 is a block diagram of the power module circuit connections of the present invention;
FIG. 2 is a schematic diagram of the filter circuit and the power conversion circuit of FIG. 1;
FIG. 3 is a schematic diagram of the control protection circuit A in FIG. 1;
fig. 4 is a schematic diagram of the control protection circuit B in fig. 1.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the power supply module of the present design includes a dc input terminal, a dc output terminal, a control protection circuit a, a control protection circuit B, a power conversion circuit, and a filter circuit composed of input and output filters; the power supply conversion circuit adopts an LM22672-ADJ chip U3 and a peripheral circuit; the control protection circuit A adopts a chip U2 with the model of MAX9021AUK-T and a peripheral circuit thereof, and the control protection circuit B adopts a chip U1 with the model of MAX16053 and a peripheral circuit thereof; the control protection circuit A and the control protection circuit B are respectively connected with the power conversion circuit, and the input and output filter circuits are respectively connected with the power conversion circuit.
As shown in fig. 2, the connection relationship between the chip U3 and the peripheral circuit and the filter circuit is: the + Vin input end is connected to the 7 pins of the chip U3 through one ends of a connecting resistor R7, a capacitor C4 and a capacitor C3, and the 3 pins and the 2 pins of the chip U3 are connected with the common ground through a resistor R14 and a capacitor C10 respectively; a pin 5 of the chip U3 is connected with the other end of the resistor R7, the cathode of the Zener diode D2 and one end of the capacitor C9, and is also connected with the drain of the field effect transistor Q1, and the grid of the field effect transistor Q1 is connected to a pin 4 of the chip U1 in the control protection circuit B through the resistor R13; the source electrode of the field effect transistor Q1, the other end of the capacitor C9 and the anode of the Zener diode D2 are connected with the common ground; a pin 4 of the chip U3 is connected with one end of a resistor R17, a resistor R9 and one end of a resistor R10, a pin 1 of the chip U3 is connected with one end of an energy storage inductor L1 and a cathode of a Schottky diode D3 through a capacitor C6, and is simultaneously connected to a pin 8 of the chip U3; the other end of the energy storage inductor L1 is connected with the other ends of the resistor R17 and the resistor R9 and one ends of the capacitor C11 and the resistor R15 and then connected with the + Vout output end, and the other end of the resistor R10 is connected with the common ground; the anode of the schottky diode D3 is connected to the other end of the capacitor C11 and the resistor R15 and then to the common ground.
The filter circuit of the design comprises an input filter circuit and an output filter circuit. The input end of the power supply circuit is connected with the common ground through a capacitor C3 and a capacitor C4, and the input end of the power supply circuit is connected with the 7 pins of the U3 at the same time and used for smoothing input current ripples and supplying energy for the power supply conversion circuit. The input end of the power supply is connected with the cathode of a Zener diode D1 and the 5 th pin of a chip U2 through a resistor R6, and the anode of a Zener diode D1 is connected with the common ground to supply energy for the control protection circuit A. The output terminal is connected with the common ground through a capacitor C11 and a resistor R15 and is used for smoothing output current ripple and providing an energy discharge path when the power supply system is switched off. A pin 5 of the chip U3 is connected with the other end of the resistor R7, the cathode of the Zener diode D2 and one end of the capacitor C9, and is also connected with the drain of the field effect transistor Q1, and the grid of the field effect transistor Q1 is connected to a pin 4 of the chip U1 in the control protection circuit B through the resistor R13; the source electrode of the field effect transistor Q1, the other end of the capacitor C9 and the anode of the Zener diode D2 are connected with the common ground; the capacitor C9 provides the input voltage minimum holding time for system start-up, and the main functions are: when the input voltage start-up holding time is less than the charging time of the capacitor C9, the power supply system does not operate. When the starting holding time of the input voltage exceeds the charging time of the capacitor C9, the power supply system works normally, so that the power supply system is effectively prevented from being started by mistake due to unstable input voltage.
As shown in fig. 3, the connection relationship between the chip U2 and its peripheral circuit is: the + Vin input end is connected with one end of a capacitor C7, a resistor R8 and a resistor R16 through a connecting resistor R4 and then connected to a pin 2 of the chip U2, and the other ends of the capacitor C7, the resistor R8 and the resistor R16 are connected and then connected with the common ground; pin 1 of the chip U2 is connected to pin 3 of the chip U1 in the control protection circuit B; the resistor R5 is connected with one end of a resistor R11, one end of a capacitor C8 and one end of a resistor R12, the resistor R11 and the other end of the capacitor C8 are connected with the 3 pins of the chip U2, and then the other ends of the resistor R11 and the capacitor C8 are connected with the common ground; a pin 5 of the chip U2 is connected with a capacitor C2, one end of a resistor R6, a cathode of a Zener diode D1 and the other end of a resistor R12, and the other end of the capacitor C2 is connected with a pin 4 of the chip U2 and then connected with the common ground; the other end of the resistor R6 is connected with the + Vin input end; the anode of the zener diode D1 is connected to common ground.
The control protection circuit A of the design adopts a MAX9021AUK-T chip U2 and a peripheral circuit thereof, a pin 4 of a chip U2 is connected with the public ground and is connected with a pin 5 of the chip through a capacitor C2, and clutter interference of a power supply end of the chip is suppressed. The pin 3 of the chip U2 is connected with its own pin 5 through a resistor R12, and is connected with the common ground through a resistor R11 and a capacitor C8, and one end of a resistor R11 and one end of a capacitor C8 are connected with the common ground, so that the reference voltage is provided for the protection circuit. The 2 pin of the chip U2 is connected with the input end through a resistor R4, and is connected with the common ground through a resistor R8, a resistor R16 and a capacitor C7 to provide sensing voltage for the protection circuit, and the capacitor C7 suppresses the crosstalk of the common ground. Pin 1 of the chip U2 is connected to pin 3 thereof through a resistor R5, which sets a return interval for the protection circuit. The pin 1 of the chip U2 is connected with the pin 3 of the chip U1, so that a protection mechanism for preventing misoperation is realized.
As shown in fig. 4, the connection relationship between the chip U1 and its peripheral circuit is: a pin 1 of the chip U1 is connected with one ends of the resistor R2 and the resistor R1, and the other end of the resistor R1 is connected with the common ground; pin 2 of chip U1 is connected to common ground; a pin 3 of the chip U1 is connected to a pin 1 of a chip U2 in the control protection circuit A, the other end of the resistor R2 and a pin 5 of the chip U1 are connected, and a pin 4 of the chip U1 is connected with the grid electrode of the field effect transistor Q1 through a resistor R13 in the power conversion circuit; the pin 6 of the chip U1 is connected with one end of a resistor R3, a capacitor C5 and a capacitor C1, and the other ends of the resistor R3, the capacitor C5 and the capacitor C1 are connected and then connected with the common ground.
The control protection circuit B of the design adopts a MAX16053 chip U1 and a peripheral circuit thereof; the pin 6 of the chip U1 is connected with the common ground through a resistor R3, a capacitor C1 and a capacitor C5, and the minimum holding time of the input voltage for preventing the system from misoperation is provided. The main functions are as follows: under the normal working state of the power supply system, when the fluctuation time of the input voltage is less than the set time length, the power supply system works normally; when the time of input voltage fluctuation is longer than the set time, the power supply system is enabled to be turned off, and a protection mechanism is realized. The resistor R3 provides a discharging loop for the capacitor C1 and the capacitor C5 in an off state.
The working principle of the utility model is as follows: the power supply conversion circuit realizes the conversion of power supply voltage, and the input and output filter circuit is used for smoothing input and output current ripples. The control protection circuit formed by the chip U1 and the chip U2 realizes a protection mechanism: (1) when the power supply module is in a starting state, the input power supply voltage simultaneously needs to meet the condition that the voltage exceeds the set threshold of the power supply module, and the exceeding threshold is kept for a time longer than the set time of the system, so that the system starts to work, and the power supply module is prevented from being started by mistake. (2) When the power supply module is in a normal working state, the input voltage fluctuates, the fluctuation voltage needs to meet the condition that the voltage is lower than the set threshold value of the power supply module, the keeping time lower than the threshold value is longer than the set time of the system, and the power supply module is enabled to be turned off. Therefore, the power supply module can meet the requirement of input end surge resistance and can better realize a protection mechanism.
The output voltage of the power supply module of the design is 3.3V. The power supply module can supply power to some power receiving equipment sensitive to the input voltage.
The power supply module of this design still includes the fixed metal casing of heat dissipation. The metal casing is sealed heat dissipation metal casing, and power device dispels the heat through heat dissipation metal casing, and inside is sealed with heat conduction casting glue, and there is the installation fixed orifices outside, and this design has improved antidetonation, waterproof, dustproof performance.
Claims (4)
1. A power supply module with the capability of identifying misoperation of input voltage is characterized in that: the power supply module comprises a control protection circuit A, a control protection circuit B, a power supply conversion circuit and a filter circuit consisting of input and output filtering; the power supply conversion circuit adopts an LM22672-ADJ chip U3 and a peripheral circuit; the control protection circuit A adopts a chip U2 with the model of MAX9021AUK-T and a peripheral circuit thereof, and the control protection circuit B adopts a chip U1 with the model of MAX16053 and a peripheral circuit thereof; the control protection circuit A and the control protection circuit B are respectively connected with the power conversion circuit, and the input and output filter circuits are respectively connected with the power conversion circuit.
2. The power supply module capable of identifying an input voltage malfunction according to claim 1, characterized in that: the connection relationship among the chip U3, the peripheral circuit and the filter circuit is as follows: the + Vin input end is connected to the 7 pins of the chip U3 through one ends of a connecting resistor R7, a capacitor C4 and a capacitor C3, and the 3 pins and the 2 pins of the chip U3 are connected with the common ground through a resistor R14 and a capacitor C10 respectively; a pin 5 of the chip U3 is connected with the other end of the resistor R7, the cathode of the Zener diode D2 and one end of the capacitor C9, and is also connected with the drain of the field effect transistor Q1, and the grid of the field effect transistor Q1 is connected to a pin 4 of the chip U1 in the control protection circuit B through the resistor R13; the source electrode of the field effect transistor Q1, the other end of the capacitor C9 and the anode of the Zener diode D2 are connected with the common ground; a pin 4 of the chip U3 is connected with one end of a resistor R17, a resistor R9 and one end of a resistor R10, a pin 1 of the chip U3 is connected with one end of an energy storage inductor L1 and a cathode of a Schottky diode D3 through a capacitor C6, and is simultaneously connected to a pin 8 of the chip U3; the other end of the energy storage inductor L1 is connected with the other ends of the resistor R17 and the resistor R9 and one ends of the capacitor C11 and the resistor R15 and then connected with the + Vout output end, and the other end of the resistor R10 is connected with the common ground; the anode of the schottky diode D3 is connected to the other end of the capacitor C11 and the resistor R15 and then to the common ground.
3. The power supply module of claim 2, wherein the power supply module is capable of identifying an input voltage malfunction, and comprises: the connection relationship between the chip U2 and its peripheral circuits is: the + Vin input end is connected with one end of a capacitor C7, a resistor R8 and a resistor R16 through a connecting resistor R4 and then connected to a pin 2 of the chip U2, and the other ends of the capacitor C7, the resistor R8 and the resistor R16 are connected and then connected with the common ground; pin 1 of the chip U2 is connected to pin 3 of the chip U1 in the control protection circuit B; the resistor R5 is connected with one end of a resistor R11, one end of a capacitor C8 and one end of a resistor R12, the resistor R11 and the other end of the capacitor C8 are connected with the 3 pins of the chip U2, and then the other ends of the resistor R11 and the capacitor C8 are connected with the common ground; a pin 5 of the chip U2 is connected with a capacitor C2, one end of a resistor R6, a cathode of a Zener diode D1 and the other end of a resistor R12, and the other end of the capacitor C2 is connected with a pin 4 of the chip U2 and then connected with the common ground; the other end of the resistor R6 is connected with the + Vin input end; the anode of the zener diode D1 is connected to common ground.
4. The power supply module of claim 2, wherein the power supply module is capable of identifying an input voltage malfunction, and comprises: the connection relationship between the chip U1 and its peripheral circuits is: a pin 1 of the chip U1 is connected with one ends of the resistor R2 and the resistor R1, and the other end of the resistor R1 is connected with the common ground; pin 2 of chip U1 is connected to common ground; a pin 3 of the chip U1 is connected to a pin 1 of a chip U2 in the control protection circuit A, the other end of the resistor R2 and a pin 5 of the chip U1 are connected, and a pin 4 of the chip U1 is connected with the grid electrode of the field effect transistor Q1 through a resistor R13 in the power conversion circuit; the pin 6 of the chip U1 is connected with one end of a resistor R3, a capacitor C5 and a capacitor C1, and the other ends of the resistor R3, the capacitor C5 and the capacitor C1 are connected and then connected with the common ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122662523.0U CN216599410U (en) | 2021-11-03 | 2021-11-03 | Power supply module with input voltage malfunction identification capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122662523.0U CN216599410U (en) | 2021-11-03 | 2021-11-03 | Power supply module with input voltage malfunction identification capability |
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| Publication Number | Publication Date |
|---|---|
| CN216599410U true CN216599410U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122662523.0U Active CN216599410U (en) | 2021-11-03 | 2021-11-03 | Power supply module with input voltage malfunction identification capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216599410U (en) |
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2021
- 2021-11-03 CN CN202122662523.0U patent/CN216599410U/en active Active
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